CVE-2020-3255 Cisco Firepower Threat Defense Software Packet Flood Denial of Service Vulnerability
Remote attackers can cause denial of service on Cisco Firepower Threat Defense devices by flooding traffic matching block policies, exhausting memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-3255?
CVE-2020-3255 is a high-severity denial of service vulnerability in Cisco Secure Firewall Threat Defense, published on 6 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the packet processing functionality of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to inefficient memory management. An attacker could exploit this vulnerability by sending a high rate of IPv4 or IPv6 traffic through an affected device. This traffic would need to match a configured block action in an access control policy. An exploit could allow the attacker to cause a memory exhaustion condition on the affected device, which would result in a DoS for traffic transiting the device, as well as sluggish performance of the management interface. Once the flood is stopped, performance should return to previous states.
Weakness: CWE-400
Which versions are affected by CVE-2020-3255?
It affects 13 products.
Products include Cisco Asa 5505 Firmware, Cisco Asa 5510 Firmware, Cisco Asa 5512-X Firmware, Cisco Asa 5515-X Firmware, Cisco Asa 5520 Firmware, Cisco Asa 5525-X Firmware and 7 more.
How do I fix CVE-2020-3255?
No fix has been published for CVE-2020-3255 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-3255 being exploited?
There is no known exploitation of CVE-2020-3255 in the wild and no public exploit code.
Other vulnerabilities in Cisco Secure Firewall Threat Defense
- CVE-2020-3179 Cisco Firepower Threat Defense Software Generic Routing Encapsulation Tunnel IPv6 Denial of Service Vulnerability
- CVE-2020-3189 Cisco Firepower Threat Defense Software VPN System Logging Denial of Service Vulnerability
- CVE-2020-3283 Cisco Firepower 1000 Series SSL/TLS Denial of Service Vulnerability
- CVE-2020-3186 Cisco Firepower Threat Defense Software Management Access List Bypass Vulnerability
- CVE-2020-3188 Cisco Firepower Threat Defense Software Management Interface Denial of Service Vulnerability
Sources
Also known as GHSA-fwmm-vfgg-4f84.